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Stefan Eestermans Email & Phone Number

Cyber Security consultant and instructor with Systems Engineering background at Optaris sprl
Location: Brussels Metropolitan Area, Belgium, Belgium 4 work roles
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✓ Verified Jun 2026 2 data sources Profile completeness 71%

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Current company
Optaris sprl
Role
Cyber Security consultant and instructor with Systems Engineering background
Location
Brussels Metropolitan Area, Belgium, Belgium
Company size
104 employees

Who is Stefan Eestermans? Overview

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Quick answer

Stefan Eestermans is listed as Cyber Security consultant and instructor with Systems Engineering background at Optaris sprl, a company with 104 employees, based in Brussels Metropolitan Area, Belgium, Belgium. AeroLeads shows a matched LinkedIn profile for Stefan Eestermans.

Stefan Eestermans previously worked as Information Security Manager at Belnet and Big Data and Security Consultant at Atos.

Company email context

Email format at Optaris sprl

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Optaris sprl

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Profile bio

About Stefan Eestermans

System Engineer with a strong affinity for Cyber SecurityExtensive Experience on UNIX Infrastructure projects and TCP/IP networkingApplied experience in software deployment, big fan of containers and Infrastructure as CodeExperience with Elasticsearch implementations, data on-boarding and optimizations

Current workplace

Stefan Eestermans's current company

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Optaris sprl
Optaris Sprl
Cyber Security consultant and instructor with Systems Engineering background
Brussels, BE
Website
belnet.be
Employees
104
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4 roles

Stefan Eestermans work experience

A career timeline built from the work history available for this profile.

Cyber Security Consultant And Instructor With Systems Engineering Background

Optaris Sprl

Brussels, BE

Information Security Manager

Current
Belnet

Brussels, Brussels Region, Belgium

Jul 2022 - Present

Cyber Security Consultant And Instructor With Systems Engineering Background

Current
Optaris Sprl

Sint-Pieters-Woluwe, Brussels Region, Belgium

Offering Consultancy and training in Cyber Security with extensive experience in System Engineering, IT infrastructure and security projects:- SIEM implementations based on Elasticsearch, Logstash and Kibana, from log onboarding and custom parsing to use cases, dashboards, data analysis...- IAM and Secret Management with Hashicorp Vault, OAuth2 and OpenID.

Nov 2009 - Present

Big Data And Security Consultant

Current
Atos

Brussels, Brussels Region, Belgium

Through the acquisition of Digital Security, I joined the Atos Big Data and Security department where I'm working as Security architect on the cloud infrastructure outsourcing project for Flemish government, based on Azure, AWS and Atos managed DC.

May 2021 - Present
Team & coworkers

Colleagues at Optaris sprl

Other employees you can reach at belnet.be. View company contacts for 104 employees →

VC Valérie Castille Valérie Castille Colleague at Optaris SprlBrussels Metropolitan Area, Belgium View → MF Matin Fous Matin Fous Colleague at Optaris SprlCotonou, Littoral, Benin, Benin View → DB Diego Barros Diego Barros Colleague at Optaris SprlCeará, Brazil, Brazil View → JK Jan Kaltofen Jan Kaltofen Colleague at Optaris SprlGreater Hamburg Area, Germany View → ИФ Иван Федорчукуов Иван Федорчукуов Colleague at Optaris SprlUkraine, Ukraine View → GV Gert Van Der Paelt Gert Van Der Paelt Colleague at Optaris SprlGhent Metropolitan Area, Belgium View → LL Laetitia Lagneau Laetitia Lagneau Colleague at Optaris SprlBrussels Metropolitan Area, Belgium View → GD Gert De Braekeleer Gert De Braekeleer Colleague at Optaris SprlLouvain Metropolitan Area, Belgium View → GC Gaby Carneiro Gaby Carneiro Colleague at Optaris SprlSobral, Ceará, Brazil, Brazil View → GC Giovanni Corsa Giovanni Corsa Colleague at Optaris SprlAntwerp Metropolitan Area, Belgium View →
FAQ

Frequently asked questions about Stefan Eestermans

Quick answers generated from the profile data available on this page.

What company does Stefan Eestermans work for?

Stefan Eestermans works for Optaris sprl.

What is Stefan Eestermans's role at Optaris sprl?

Stefan Eestermans is listed as Cyber Security consultant and instructor with Systems Engineering background at Optaris sprl.

Where is Stefan Eestermans based?

Stefan Eestermans is based in Brussels Metropolitan Area, Belgium, Belgium while working with Optaris sprl.

What companies has Stefan Eestermans worked for?

Stefan Eestermans has worked for Optaris Sprl, Belnet, and Atos.

Who are Stefan Eestermans's colleagues at Optaris sprl?

Stefan Eestermans's colleagues at Optaris sprl include Valérie Castille, Matin Fous, Diego Barros, Jan Kaltofen, and Иван Федорчукуов.

How can I contact Stefan Eestermans?

You can use AeroLeads to view verified contact signals for Stefan Eestermans at Optaris sprl, including work email, phone, and LinkedIn data when available.

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